New and low cost method for making structural materials from problem flyashes and from flyashes likely to originate from certain potential air pollution control processes. Report No. 34

Conference · Mon Jan 01 04:00:00 EST 1968

OSTI ID:5255571

Shafer, Jr, H E; Cockrell, C F; Leonard, J W

The paper describes significant technological development for the processing of certain problem power plant flyashes which contain a high water-soluble mineral content and which otherwise yield inferior flyash based brick. This development is based on the addition of hydrochloric acid to the flyash-bottom ash-sodium silicate blends used for the production of flyash based structures. Favorable changes are evident in (1) sodium silicate consumption, where often approximately one-half of the amount used for making brick from normal flyash is required; (2) processing costs; and (3) strength and appearance of the resulting freshly formed green and fired structural products. In some high cost instances (above the cost of 30 dollars or less per thousand brick estimated for normal flyashes) hydrochloric acid additions can replace or reduce other costly additives required with problem flyashes to result in a savings of as much as nine dollars per thousand brick. These developments offer promising possibilities for utilizing problem flyashes as well as flyashes which may come into contact with water soluble sulfur as a result of the eventual application of certain experimental air pollution control processes.

• Research Organization: West Virginia Univ., Morgantown (USA). Coal Research Bureau
• OSTI ID: 5255571
• Report Number(s): CONF-680202-6
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500 -- Coal
Lignite
& Peat-- Products & By-Products
010800* -- Coal
Lignite
& Peat-- Waste Management
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ASHES
BRICKS
BUILDING MATERIALS
CHEMICAL COMPOSITION
ECONOMICS
FLY ASH
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MANUFACTURING
MATERIALS
MINERALS
OXYGEN COMPOUNDS
RESIDUES
SILICATES
SILICON COMPOUNDS
SODIUM COMPOUNDS
SODIUM SILICATES
SOLUBILITY
WASTE PRODUCT UTILIZATION
WASTES